Some have argued that the DVD release was done for two reasons: to increase interest in ROTS to also increase revenue, but more than likely to pay for ROTS to be made. If you read the making of book, there is this constant theme of not wasting digital shots, not falling behind timetables so extra workers don't have to be hired, just an overall theme that LFL (with the opening of new facilities on the horizon) was getting strapped for cash and certainly couldn't a)lose control of the film to financers and b)couldn't push back the release date.